A prayer to Christ and St. Demetrios the Myrrh-streamer

 

Christ strengthening St. Demetrios, and he in turn, St. Nestor (source)

   
A prayer to Christ and St. Demetrios the Myrrh-streamer (amateur translation)
O Lord Jesus Christ our God, the Pre-eternal Word of God and the Father, Who through Your grace endowed endurance in the soul of the glorious Martyr Demetrios, to withstand manfully, in a body of clay, the great tortures of tyrants, on behalf of Your name, strengthen us also, we pray, that we may bravely endure the temptations brought about because of our sins, and all forms of dangers of the devil. And as You then scattered the schemes of the lawless through Your power, granting the ranks of the Angels, also now, through his intercessions, gladden our hearts, delivering us from this bitter tyrany that has been laid upon us, that we also, Your humble entreaters, may go forth with peace in life, and commemorate his annual memory, that we may be made worthy of Your mercy, for which You are well-pleased. For You are ever blessed, unto the ages of ages. Amen.
(source)
  

Through the prayers of our Holy Fathers, Lord Jesus Christ our God, have mercy on us and save us! Amen!